Linus Torvalds writes: (Summary)
That actually sounds like we could just
That actually sounds like we could just
(a) make gcc 4.5 be the minimum required version
(a) make gcc 4.5 be the minimum required version
(b) actually error out if we find a bad compiler
(b) actually error out if we find a bad compiler
Upgrading the minimum required gcc version to 4.5 is pretty much going to happen _anyway_, because we're starting to rely on "asm goto" for avoiding speculation.
avoiding speculation.
End result: maybe we can make the configuration phase just use the standard "does gcc support this flag" logic, and then just have a separate script that is run to validate that gcc doesn't generate garbage, and error out loudly if it does.
garbage, and error out loudly if it does.
Linus
Linus
Linus
That actually sounds like we could just
(a) make gcc 4.5 be the minimum required version
(a) make gcc 4.5 be the minimum required version
(b) actually error out if we find a bad compiler
(b) actually error out if we find a bad compiler
Upgrading the minimum required gcc version to 4.5 is pretty much going to happen _anyway_, because we're starting to rely on "asm goto" for avoiding speculation.
avoiding speculation.
End result: maybe we can make the configuration phase just use the standard "does gcc support this flag" logic, and then just have a separate script that is run to validate that gcc doesn't generate garbage, and error out loudly if it does.
garbage, and error out loudly if it does.
Linus
Linus
Linus